Apple Thursday released OS X 10.8.5 in what's likely the final Mountain Lion release before OS X Mavericks ships this fall. The update offers some bug fixes and also support for Intel's new Haswell CPUs.

The fixes include fixing an issue with 802.11ac WiFi performance. Also Apple says a bug that sometimes prevented the screen saver from starting has been resolved. Lastly the update should improve Xsan reliability.

For Haswell, Apple so far has only shipped MacBook Air computers with the latest Intel chips. Those computers shipped with a special version of 10.8.4.